Characteristics of the antibiotic regimen that affect antimicrobial resistance in urinary pathogens

Table 1 Characteristics of the antimicrobial prescriptions in 5650 older adults prior to (minimum 2 days) an isolation of Escherichia coli (n = 7379) from a urine sample as retrieved from 15 voluntary participating Belgian clinical laboratories (January 2005 – December 2005)

IQR: interquartile range Time: time in days between sampling and start of preceding antimicrobial (antibiotic) prescription. DDD: sum of defined daily dose (DDD) prior to sampling. N_prescriptions: number of prescriptions (If the same antimicrobial formulation (substance) was delivered within 7 days this was defined as one prescription). %Injectable: route of administration (modeled as the ratio of preceding injectable over preceding orally administered antimicrobial prescriptions, i.e. the proportion of preceding parenteral prescriptions). ARI: Antimicrobial Resistance Index calculated as proportion of non-susceptible antimicrobial resistance test results as defined by Kirby Bauer disk diffusion test

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